Seems like yet another check to their power.
It is and at the same time it isn't.
If the other two branches ignore the decisions, then we have a rogue government. This was, IMO, the problem with the NEW DEAL legislation. No respect for the Rule of Law by the other two branches.
On the other hand, by giving its decision, the Legislature can use it's powers to moot the decision in many cases, or call for an amendment in others.